From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from desiato.infradead.org (desiato.infradead.org [90.155.92.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 50E251AE87D for ; Wed, 31 Jul 2024 12:20:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.155.92.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722428411; cv=none; b=pplyST9AGFR67qdW8JG5u87+R7Ug/0KKmwiZBE1L+3TIS41absQjqth9uw39Xp//yirhJr8Jeisd0UgOUjv0q5Z7tKjZrIiIOD/1uJkBw32Y9Tj8r9nPIhtIXA9dDbma9Awy0K/RvER9czbsddmoGwCK3o1c8HsOx3hwgsHXeuE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722428411; c=relaxed/simple; bh=XfCBT7CW2C1Zp/1mIh2BKFue4nKOdj2tHTvLAkqRFBs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=BKzSbdwZkBCTEmUydAZ5ywR8U/00/5GGahxIgFeAVyyJydiYNsm18309CB13nh0nt2cOaQt8ZAtxNDAx7FxA/M5BHHTWF8938aa9JmLqKH0LuGeVgeEKu/H7jDZUjrfja98Jd24oFWuvBSNG0KVuHlvTK8IotGAP7UX7JspLgSE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=iRXpD+vm; arc=none smtp.client-ip=90.155.92.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="iRXpD+vm" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=XfCBT7CW2C1Zp/1mIh2BKFue4nKOdj2tHTvLAkqRFBs=; b=iRXpD+vmVA/ps02klXY+HltDW7 FK5ZAC47z8wWZxthH5g6gzbcrGFUA6b3webgkueobs0BL9wwwMkp5Glc58ISVOXoFbI98GyP1+NQs o2yhUZ4fxWWReXOw740VvByjmiARl3wR5HW8r0Rl95uREwZ/DiG0S4NCqYp3ciO2nTKkATlFXvbvt hxkerZDU2KfZ452zB6fOq+CyBq4/Gh+zsFeNAUtR89o9iNRdiQQ/6t20L8OO6644jGEdFRoWFnMFe UkTxkhgAcoGALjTo2fwY+yCBdsNsmMUN9vydKk0pFyLk/CNeH7bK3AhwLvksE4UEOovFCizFZJ03L pCv80QGA==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.97.1 #2 (Red Hat Linux)) id 1sZ8JH-00000005DG9-0eSD; Wed, 31 Jul 2024 12:20:04 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 382C5300820; Wed, 31 Jul 2024 14:20:02 +0200 (CEST) Date: Wed, 31 Jul 2024 14:20:02 +0200 From: Peter Zijlstra To: Guenter Roeck Cc: Jens Axboe , Linus Torvalds , Andy Lutomirski , Ingo Molnar , Peter Anvin , Linux Kernel Mailing List , the arch/x86 maintainers Subject: Re: Linux 6.11-rc1 Message-ID: <20240731122002.GE33588@noisy.programming.kicks-ass.net> References: <20240730192237.GR33588@noisy.programming.kicks-ass.net> <231e7a2e-7e2e-4b82-b084-8943b2236de0@kernel.dk> <20240730193841.GS33588@noisy.programming.kicks-ass.net> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Tue, Jul 30, 2024 at 01:24:34PM -0700, Guenter Roeck wrote: > An interesting bit of information: The problem is seen with many, > but not all CPUs. For example, I don't see it with athlon, n270, Dhyana, > or EPYC. qemu32 is affected, but qemu64 is fine. But on the other side > both kvm32 and kvm64 are affected. pti=off makes it go away, could be those CPU models don't have meltdown and as such don't enable PTI.